/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.ssl;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufInputStream;
import java.io.File;
import java.io.IOException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.KeyFactory;
import java.security.KeyStore;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.Security;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.ArrayList;
import java.util.List;
import javax.crypto.Cipher;
import javax.crypto.EncryptedPrivateKeyInfo;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSessionContext;
/**
* A server-side {@link SslContext} which uses JDK's SSL/TLS implementation.
*/
public final class JdkSslServerContext extends JdkSslContext {
private final SSLContext ctx;
private final List<String> nextProtocols;
/**
* Creates a new instance.
*
* @param certChainFile an X.509 certificate chain file in PEM format
* @param keyFile a PKCS#8 private key file in PEM format
*/
public JdkSslServerContext(File certChainFile, File keyFile) throws SSLException {
this(certChainFile, keyFile, null);
}
/**
* Creates a new instance.
*
* @param certChainFile an X.509 certificate chain file in PEM format
* @param keyFile a PKCS#8 private key file in PEM format
* @param keyPassword the password of the {@code keyFile}.
* {@code null} if it's not password-protected.
*/
public JdkSslServerContext(File certChainFile, File keyFile, String keyPassword) throws SSLException {
this(certChainFile, keyFile, keyPassword, null, null, DefaultSslWrapperFactory.instance(), 0, 0);
}
/**
* Creates a new instance.
*
* @param certChainFile an X.509 certificate chain file in PEM format
* @param keyFile a PKCS#8 private key file in PEM format
* @param keyPassword the password of the {@code keyFile}.
* {@code null} if it's not password-protected.
* @param ciphers the cipher suites to enable, in the order of preference.
* {@code null} to use the default cipher suites.
* @param nextProtocols the application layer protocols to accept, in the order of preference.
* {@code null} to disable TLS NPN/ALPN extension.
* @param wrapperFactory a factory used to wrap the underlying {@link SSLEngine}.
* This is required if {@code nextProtocols} is not {@code null} or empty
* @param sessionCacheSize the size of the cache used for storing SSL session objects.
* {@code 0} to use the default value.
* @param sessionTimeout the timeout for the cached SSL session objects, in seconds.
* {@code 0} to use the default value.
*/
public JdkSslServerContext(
File certChainFile, File keyFile, String keyPassword,
Iterable<String> ciphers, Iterable<String> nextProtocols,
SslEngineWrapperFactory wrapperFactory,
long sessionCacheSize, long sessionTimeout) throws SSLException {
super(ciphers, wrapperFactory);
this.nextProtocols = translateProtocols(nextProtocols);
if (certChainFile == null) {
throw new NullPointerException("certChainFile");
}
if (keyFile == null) {
throw new NullPointerException("keyFile");
}
if (keyPassword == null) {
keyPassword = "";
}
String algorithm = Security.getProperty("ssl.KeyManagerFactory.algorithm");
if (algorithm == null) {
algorithm = "SunX509";
}
try {
KeyStore ks = KeyStore.getInstance("JKS");
ks.load(null, null);
CertificateFactory cf = CertificateFactory.getInstance("X.509");
KeyFactory rsaKF = KeyFactory.getInstance("RSA");
KeyFactory dsaKF = KeyFactory.getInstance("DSA");
ByteBuf encodedKeyBuf = PemReader.readPrivateKey(keyFile);
byte[] encodedKey = new byte[encodedKeyBuf.readableBytes()];
encodedKeyBuf.readBytes(encodedKey).release();
char[] keyPasswordChars = keyPassword.toCharArray();
PKCS8EncodedKeySpec encodedKeySpec = generateKeySpec(keyPasswordChars, encodedKey);
PrivateKey key;
try {
key = rsaKF.generatePrivate(encodedKeySpec);
} catch (InvalidKeySpecException ignore) {
key = dsaKF.generatePrivate(encodedKeySpec);
}
List<Certificate> certChain = new ArrayList<Certificate>();
ByteBuf[] certs = PemReader.readCertificates(certChainFile);
try {
for (ByteBuf buf: certs) {
certChain.add(cf.generateCertificate(new ByteBufInputStream(buf)));
}
} finally {
for (ByteBuf buf: certs) {
buf.release();
}
}
ks.setKeyEntry("key", key, keyPasswordChars, certChain.toArray(new Certificate[certChain.size()]));
// Set up key manager factory to use our key store
KeyManagerFactory kmf = KeyManagerFactory.getInstance(algorithm);
kmf.init(ks, keyPasswordChars);
// Initialize the SSLContext to work with our key managers.
ctx = SSLContext.getInstance(PROTOCOL);
ctx.init(kmf.getKeyManagers(), null, null);
SSLSessionContext sessCtx = ctx.getServerSessionContext();
if (sessionCacheSize > 0) {
sessCtx.setSessionCacheSize((int) Math.min(sessionCacheSize, Integer.MAX_VALUE));
}
if (sessionTimeout > 0) {
sessCtx.setSessionTimeout((int) Math.min(sessionTimeout, Integer.MAX_VALUE));
}
} catch (Exception e) {
throw new SSLException("failed to initialize the server-side SSL context", e);
}
}
@Override
public boolean isClient() {
return false;
}
@Override
public List<String> nextProtocols() {
return nextProtocols;
}
@Override
public SSLContext context() {
return ctx;
}
/**
* Generates a key specification for an (encrypted) private key.
*
* @param password characters, if {@code null} or empty an unencrypted key is assumed
* @param key bytes of the DER encoded private key
*
* @return a key specification
*
* @throws IOException if parsing {@code key} fails
* @throws NoSuchAlgorithmException if the algorithm used to encrypt {@code key} is unkown
* @throws NoSuchPaddingException if the padding scheme specified in the decryption algorithm is unkown
* @throws InvalidKeySpecException if the decryption key based on {@code password} cannot be generated
* @throws InvalidKeyException if the decryption key based on {@code password} cannot be used to decrypt
* {@code key}
* @throws InvalidAlgorithmParameterException if decryption algorithm parameters are somehow faulty
*/
private static PKCS8EncodedKeySpec generateKeySpec(char[] password, byte[] key)
throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException,
InvalidKeyException, InvalidAlgorithmParameterException {
if (password == null || password.length == 0) {
return new PKCS8EncodedKeySpec(key);
}
EncryptedPrivateKeyInfo encryptedPrivateKeyInfo = new EncryptedPrivateKeyInfo(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(encryptedPrivateKeyInfo.getAlgName());
PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
SecretKey pbeKey = keyFactory.generateSecret(pbeKeySpec);
Cipher cipher = Cipher.getInstance(encryptedPrivateKeyInfo.getAlgName());
cipher.init(Cipher.DECRYPT_MODE, pbeKey, encryptedPrivateKeyInfo.getAlgParameters());
return encryptedPrivateKeyInfo.getKeySpec(cipher);
}
}